Dzhokhar Tsarnaev, the main suspect in the Boston Marathon bombings that killed three people and wounded 264 others, pleaded not guilty during his first court appearance Wednesday.

Victims and their families filled the courtroom, seeking justice against the man they say changed their lives forever.

The hearing lasted less than 10 minutes. Tsarnaev repeatedly said "not guilty" as the clerk read each of the 30 charges against him.

The only emotion Tsarnaev showed was for his sisters. He smiled at them when he entered the courtroom and blew a kiss when he left.

Victims of the terror attack who attended the hearing say his attitude was far from remorseful.

"He never looked at us," Peter Brown, uncle of one of the bombing victims, said. "He never turned in our direction, and we were sitting directly behind him."

"That he was smirking, that he had no care for, I don't know, that he just had the audacity to smirk at us and that's how I took it," said Liz Norden, whose two sons, J.P. and Paul Norden, each lost their right leg in the bombings. "I actually felt sick to my stomach."

"I want more than anything to just stand up on two feet," one of her sons said. "You have no idea how bad I want to get up."

Outside the court house, 20 MIT officers stood at attention. Tsarnaev is accused of killing one of their own as he and his older brother, Tamerlan, tried to outrun police.

"I didn't see a lot of remorse. I didn't see a lot of regret," MIT Police Chief John DiFava said. "It just seemed to me that if I was in that position, I would have been a lot more nervous, certainly scared."

Tsarnaev's supporters also waited outside the court. They cheered when his motorcade arrived, yelling "Justice for Jahar," the name the 19-year-old was known by.

Prosecutors say Tsarnaev wrote about his motivations for the bombing on the inside walls of the boat where he hid from authorities, accusing the U.S. government of "killing our innocent civilians."

"I don't like killing innocent people," he wrote, but added, "I can't stand to see such evil go unpunished. ... We Muslims are one body, you hurt one you hurt us all."